To Next PageTo Next PageWhy is my Mitsubishi Electric FR-E800 Inverter motor vibrating?
If hunting (vibration or acoustic noise) occurs in the motor or the machine, it might be due to a speed control gain or torque control gain that is too high, or incorrect motor wiring. Try setting Pr.820 lower and Pr.821 higher, or setting Pr.824 Torque control P gain 1 (current loop proportional gain) lower. Also, check the wiring.
Why is the machine movement unstable with my Mitsubishi Electric FR-E800?
If the machine movement is unstable, it could be due to the speed control gain not being suitable for the machine or a slow response due to the inverter's acceleration/deceleration time setting. Try adjusting Pr.820 and Pr.821 or setting the optimum acceleration/deceleration time.
What to do if Mitsubishi Electric FR-E800 speed does not accelerate to the command speed?
If the speed does not accelerate to the command speed, it could be due to torque shortage, causing the torque limit to operate, or because only P (proportional) control is performed. To resolve this, try raising the torque limit or increasing the capacity. If only P control is being performed, select PI control, as speed deviation occurs under P control when the load is heavy.
Why does the motor speed fluctuate with my Mitsubishi Electric FR-E800 Inverter?
If the motor speed fluctuates, it may be due to variations in the speed command, torque shortage, or a speed control gain that is not suitable for the machine, potentially causing resonance. Check that the speed command sent from the controller is correct and take EMC measures. You can also try setting Pr.72 lower and Pr.822 Speed setting filter 1 higher. Additionally, raising the torque limit might help. If the speed control gain is the issue, adjust Pr.820 Speed control P gain 1 and Pr.821 Speed control integral time 1.
Why is the acceleration/deceleration time different from the setting on my Mitsubishi Electric FR-E800 Inverter?
If the acceleration/deceleration time is different from the setting, it could be caused by torque shortage or a load inertia that is too high. To solve this, raise the torque limit or set an acceleration/deceleration time suitable for the load.
What causes rotation ripple during low-speed operation on a Mitsubishi Electric FR-E800 Inverter?
If rotation ripple occurs during low-speed operation with your Mitsubishi Electric Inverter, it could be due to a high carrier frequency affecting the motor rotation or a speed control gain that is too low. Try setting Pr.72 lower or setting Pr.820 higher.
Why Mitsubishi Electric FR-E800 Inverter motor speed is not correct?
There could be several reasons why the motor speed is incorrect. It could be due to the speed command from the controller being different from the actual speed, possibly affected by noise. To resolve this, check the speed command sent from the controller and take EMC measures. You may also need to lower the setting of Pr.72 PWM frequency selection. Another reason could be a difference between the command speed and the speed recognized by the inverter; in this case, adjust bias and gain (Pr.125, Pr.126, C2 to C7) of the speed command again. Finally, the motor constant might vary due to an increase in the motor temperature. Try enabling the online auto tuning at startup (set Pr.95 (Pr.574) = "1") under Real sensorless vector control.
Why does Mitsubishi Electric FR-E800 Inverter motor speed fluctuate?
Fluctuations in motor speed can stem from a few causes. First, the speed command might be varying; in this case, verify the speed command sent from the controller and implement EMC measures. You could also try setting Pr.72 lower or setting Pr.822 Speed setting filter 1 higher. Second, there might be a torque shortage, so try raising the torque limit. Lastly, the speed control gain might not be suitable for the machine, potentially causing resonance. Adjust Pr.820 Speed control P gain 1 and Pr.821 Speed control integral time 1 to address this.
What to do if Mitsubishi Electric FR-E800 speed does not accelerate?
If the speed isn't accelerating to the command speed, it might be due to a torque shortage or the torque limit is operating. Try raising the torque limit. Another potential cause is that only P (proportional) control is being performed. Since speed deviation occurs under P control when the load is heavy, select PI control.
How to stop hunting in Mitsubishi Electric Inverter?
Hunting, which manifests as vibration or acoustic noise, can occur due to several reasons. If the speed control gain is too high, set Pr.820 lower and Pr.821 higher. If the torque control gain is too high, set Pr.824 Torque control P gain 1 (current loop proportional gain) lower. Also, incorrect motor wiring can cause hunting, so check the wiring.
General| Brand | Mitsubishi Electric |
|---|---|
| Model | FR-E800 |
| Category | Inverter |
| Language | English |
